Island



No. 623,885. Patented Apr. 25, I899. c. P. COTTRELL.

MECHANICAL MUVEMENT.

(Application filed. Jan. 1 1, 1899.) (No Model.) I 5 Sheets-Sheet I.

WITNESSES: INVENTOR ATTORNEY m: scams PETERS o0 PHOTO LITHD.. WASHINGTON 0. c.

No. 623,885. Patented Apr. 25, I899.

c. P. CUTTBELL.

MECHANICAL MOVEMENT.

- (Application filed. Jan. 11, 1899.) (No Model.) 5 Shuts-Sheet 2.

WITNESSES: I lNVENTOR ,'J i7 BY W Y/ ATTORNEY YHE nanms PETERS 00.. PHOYO-LITNO., WASHINGTON. n. c,

No. 623,885. Patented Apr. 25, I899. 0. P. GUTTRELL.

MECHANICAL MOVEMENT.

(Appfication filed Jan. 11, 1899.) (No Model.) I 5 Sheets-Sheet 3.

Q &

WITNESSES: INVENTOR @W Tflm ATTORNEY ma Nbams pzrzns cu, Pnoruuma, WASHINGTON. n. c.

No; 623,885. Patented Apr. 25, I899. C. P. CDTTRELL. MECHANICAL MOVEMENT.

(Application filed Ian. 11, 1899.)

5 Shaets8heet 4.

(No Model.)

WITNESSES:

No. 623,885. Patented Apr. 25, I899. 6. P. COTTRELL. MECHANICAL MOVEMENT.

(Applicatio'n filed Jan. 11, 1899.)

5 Sheets-Sheet 5.

(No Model.

INVENTOR WITNESSES:

ATTORNEY m: NORRIS PETERS ca, wo'rmn'mgwnsmumm m c.

Nrrn STATES A'rENr FFIQE.

CIIARLES P. COTTRELL, OF WESTERLY, RHODE ISLAND, ASSIGNOR TO THE C. B. COTTRELL & SONS COMPANY, OF JERSEY CITY, NEW JERSEY; STON- INGTON, CONNECTICUT, AND NEW YORK, N. Y.

MECHANICAL MOVEMENT.

SPECIFICATION formingpart of Letters Patent No. 623,885, dated April 25, 1899.

Application filed January 11, 1899. Serial No. 701,812, (No m d l.)

To all whmn it may concern:

Be it known that I, CHARLES P. COTTRELL, a citizen of the United States, and a resident of Westerly, in the county of WVashington and State of Rhode Island, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specilication.

My invention relates to that class of mechanical movements set forth in the Letters Patent No. 471,786, granted March 29, 1892, to Calvert B. Cottrell, and has for its main object to substitute for the forked lever and its actuating parts shown and described in said patent different and more desirable mechanism for performing the functions of said forked lever. The various parts comprising this mechanism, their arrangement, and their mode of operation will be hereinafter fully described.

My invention therefore consists in this substituted mechanism and in its combination, in whole and in part, with other devices and mechanisms, all as will be hereinafter more particularly set forth, and specified in the appended claims.

In the accompanying drawings, Figure l is an end view of a mechanical movement embodying myimprovements. Fig. 2 is a horizontal section of the same on the line to w of Fig. 1. Fig. 3 is a longitudinal vertical section of the whole machine, taken on the line a a: of Fig. 2. Fig. 4is an enlarged plan View of the newly-devised mechanism with portions of certain of the parts broken away. Fig. 5 is a similar view, but with the moving parts in different positions. Fig. 6 is a vertical section taken at the line y y of Fig. 4. Fig. 7 is a similar section taken at the line 3 z of Fig. 5. Figs. 8, 9, 10, ll, and 12 are detail sectional views in plan, on a smaller scale, to illustrate the operations of the various parts at different times or in different positions of the rack-frame or moving bed and which will be hereinafter more specifically referred to.

In the various views the same part will be found designated by the same numeral of reference.

The invention has been designed more particularly for use in connection with the reciprocating beds of printing-presses, but it may be advantageously employed in various other kinds of machines. The bed or other body to be reciprocated is moved longitudinally back and forth as heretofore by means of two longitudinally-arranged toothed racks connected to the bed or reciprocating part and a constantly-revolving toothed pinion which alternately engages with said racks. Means are provided for properly guiding the pinion into and out of engagement with said racks at the ends of the strokes of the bed or reciprocating member. Means are also provided for starting the bed in each direction with a slow movement and gradually accelerating its speed until the revolving pinion engages with one or the other of the said racks and moves the bed at full speed and for also gradually retarding the bed during the completion of its stroke in each direction and just prior to its stoppage and restarting it again in the opposite direction.

For the purpose of this case, 1 may represent the reciprocating bed of a printing-press, and this may be mounted for its movement in any suitable way in the framing 2 of the machine.

To the under side of the bed are rigidly connected two vertically-arranged straight racks 3, disposed longitudinally of-the bed and in this case in the same vertical plane, or one directly above the other, and with the teeth of one rack facing those of the other. These racks are preferably attached by screws to an open frame or casting which is rigidly attached to the bed, and in the form shown c011- sists of two longitudinal bars 4:, one over the other, united at their ends by integral curved bars or members 5 and vertical bars 6. At each end of the rack-frame and attached to the curved member is a semicircular or curved rack 7.

S designates the driving gear or pinion, which alternately engages the straight racks 3, and 9 designates a smaller gear or pinion mounted rigidly and eccentrically of the axis of rotation of the gear 8, but arranged to turn therewith and mesh with the curved end rack 7 when the gearSis leaving one straight rack and while it starts to reengage the other straight rack and during the time the gear 8 is wholly out of mesh with both straight racks.

The driving-gear S has a slight rising-andfalling motion to disengage from one rack and to engage the other, and hence the diameter of this gear is less than the distance apart of the oppositely-disposed racks. In order to afford the gearing the necessary np-and-down movements, its rotating shaft 10 is mounted eccentrically in a bushing 11, fitted in an eye or bearing at the upper end of a standard or bracket 12, secured to the base of the frame. To the outer end of said bushing is connected at crank-arm 13, to which is jointed at 11 one end of a link or pitman 15, whose opposite end is slotted or provided with an open frame 16, that embraces and slides upon a square block 17, mounted loosely on a shaft 18, extending transversely of the machine and mounted in suitable bearings.

lletween the ends of the pitman or link is attached a roller 19, that works in a grooved cam 20, formed in the face of a disk or wheel 21, faston the shaft 18. This cam is so shaped and proportioned as that at the proper times it moves the pitman longitudinally and causes it,through the crank-arm ,to turn the bushing, and thereby elevate or lower the shaft 10 and the driving-gear 8 attached thereto, so as to cause said gear while it is rotating to move bodily from one straight rack toward the other, and which movement takes place when one of said straightracks has run out of mesh with said gear at near the end of its stroke and while the reversing of the bed is occurring under the action and control of the mechanism to be hereinafter described. Just before the driven rack and the gear 8 part company the guiding gear or pinion 9 strikes into mesh with one of the curved racks and continues its engagement therewith until the main gear 8 has been moved up or down to come properly into mesh with the other straight rack, which it then proceeds to drive at full speed.

The power may be applied at the shaft 22, which, as shown, is provided with the usual pulleys 23, and on the inner end of said shaft, which is mounted in a bearing 2% in the side frame and in a bearing 25, extended laterally from the bracket 12, is provided a toothed gear-wheel 26, that constantly meshes with and drives the gear 3, which turns always in the same direction during the operation of the machine.

The cam-shaft 18 is provided with a large spur-gear 27, which is driven by a pinion 28 on the power-shaft 29.

The mechanism thus far described comprises the means for giving the bed its main movements back and forth and means for guiding the driving-gear into and out of engagement with the straight racks with an easy and certain action, thus avoiding any shocks or thumping action which might otherwise occur when the driving-gear strikes into fresh engagement with either of the straight racks immediately following the actual reversing operation to be presently described.

\Vhile I have shown the straight racks as located in the same vertical plane and arranged to have the drivinggear swing up and down to alternately engage said racks, this of course is not essential, so far as the main features of my improvement are concerned, and in lieu of such a construction and mode of operation the straight racks may be offset and the driving-pinion may engage them alternately by a lateral sliding movement, as shown and described in the Cottrell patent aforesaid; and although I have shown the curved end racks as semici rcular and continuons and as cooperating with a continuous pinion or guiding-wheel it will also be understood that as far as my invention is concerned these end racks forming con tinuations of the main racks may be made in the form of sections or segments not continuous, and the guiding-gear which eoacts therewith may be only a partial pinion or segments of gears, as also shown and described in the said Cottrell patent.

I shall now describe the reversing mechanism proper by which the bed is gradually retarded at near the end of its stroke in either direction and gradually accelerated after the end of the stroke has been reached and until the main driving-gear again takes hold of one of the main racks and drives the bed for the major part of its stroke under the full speed of said gear.

Each of the bars (3 on the rack-frame carrios or is provided with a vertical bearer or cross-head 29, with which cooperates a crankpin or stud 30, provided with an anti frictionroller 31, that traverses the face of said bearer and operates 'on one half thereof gradually to check the speed of the bed and on the other half gradually to accelerate the speed of the same. This crank-pin is fixed at the outer end of a crank-arm 32, that is secured by screws 33 on the face of the fixed guiding pinion or gear 9 and radially of the axis thereof. The center of said crank-pin is coincident with the pitchcircle of the said pinion, which pinion is onehalf the diameter of the driving-gear S, and is so attached thereto as that its pitch-circle passes through the plane of the axis of the gear 8 and through the pitch-line of the teeth of said gear. The pitch-circle of the guidinggear 9 and the center of the crank-roll pass through the centers from which the curved racks 7 are formed, or, in other words, as is shown in Fig. 3, the pitch-lines of the gears 8 and 9 and the centers of the crank-roll and curved rack all coincide.

As far as the main features of my invention are concerned the bearers 29 may be curved and concentric with the curved racks, with their treads or faces arranged to coincide with the pitch-lines of the teeth of said racks, and the crank-roller, in order to cooperate therewith, may be fixed axially of the guiding-gear 9, as shown and described in prior patents in this art; but I prefer to use the straight vertical bearers and the crank-roll arranged, as shown, to work in conjunction therewith.

At each end of the rack-frame is a downwardly-projecting stud 34, provided, preferably,with an antifriction-roller which during the time of reversal of the bed is to coact with a cam-like device which may be attached to or formed of a piece with a plate or disk 35, which is preferably horizontally arranged. There are two cams 36 and 37, one arranged over the other, the lower cam 36 coacting with the stud 34 on the right of the frame and the cam 37 coacting with the stud 34 on the left thereof, the stud on the right being slightly longer than the one on the left, so as to reach the lower cam. The cams are curved or crescent-shaped and mountedon the upper side of said disk. On the under side of the disk is attached by two upwardly-passing screws 42 a pinion 43.

Thepinion 43 is loosely mounted upon a shouldered stud or bolt 44, that is threaded at its lower end and attached eccentrically by means of a nut 45 to the back side of a bevelgear 46, and the said pinion 43 is thereby adapted to rotate in engagement with the teeth 48, formed circularly on the inner edge of a ring 49, that is supported at one side upon a short bracket 50, mounted on a horizontal arm or bracket 51, and at its opposite side upon another short bracket 52, mounted on the vertical standard 12. The said bevel-gear 46 is driven by a toothed bevel-gear 60, fixed at the inner end of ahorizontal shaft 61,which has a bearing at its outer end in the main frame, and passing through the vertical bracket 12 has an inner bearing at the inner end of the cross-arm or bracket 51, which at this end is attached to the vertical standard 12 and its outer end to the side frame of the machine.

The shaft 61, bearing the bevel driving-gear 60, is provided at its outer end with a toothed gear 63, that engages with an idle or intermediate gear 64, mounted on a stud or pivot in the side frame, and the said intermediate gear meshes with the large spur-gear 27, which is driven by the pinion 28 on the powershaft. Thus by the power through the gear 28, gear 27, intermediate gear 64, and the gear 63 the shaft 61 is rotated, and through the gear 50 the bevel-gear 46 is rotated, and the pinion 43, mounted thereon or connected thereto, is caused to turn therewith and travel around the fixed ring 49 with the disk 35 and cams 36 and 37.

The pinion 43 turns independently on its own axis while it is being carried around bodily with the bevel-gear 46, thereby keeping the face of the cam in contact with the downwardly-projecting stud 34 and causing the bed positively to make its full stroke in case it would otherwise fail to do so by reason of too little momentum or too much spring resistance to the bed.

It will be understood that in this class of printing-presses the bed is provided with airsprings or the like, which operate to reduce the momentum of the bed during the slowingdown movements and which subsequently react to start the bed in the reverse direction. It sometimes happens that there is too much resistance in the springs, and hence the momentum is all taken out of the bed before it has completed its full stroke, and it is to provide for this contingency, more especially, that the cam is caused to come around behind the depending stud-roll on the bed-frame and by the continued rotation of said cam force or push the bed along to the full end of its stroke. If the bed be nicely balanced as to momentum and spring resistance, the cam will act then simply to hold the vertical bearer up against the crank-roll 31 during'the slowing down of the bed" and during the restarting of the bed in the opposite direction. In other words, when the cam is acting on the depending bedroll 34 the crank-roll 31 is acting on the vertical bearer, so that the bed practically is held firmly between the cam and the crank-roll during the entire reversing operation, the cam working on the outer side of the bed, so to speak, and the crank-roller on the inner side, so that there is a sort of grasping action upon the bed by the aforesaid devices, which prevents any lost motion or excessive motion to the bed.

I shall now describe the operation of the reversing devices, referring more particularly to Figs. 2 and 3 and the series of diagrammatic views at Figs. 13 to 17, inclusive.

Figs. 2, 3, and 8 show the mechanism in corresponding positions, at which time the bed has completed its full travel toward the left and has been stopped and is about to be started in the reverse direction. As will be seen at Fig. 3, the main driving-gear 8 is entirely out of mesh with both the longitudinal racks 3, the guiding-pinion 9 is in a position centrally of the curved rack 7, which it is traversing, and the crank-roll 31 is on the dead-point or centrally of the vertical bearer 20. The bed has reached the limit of its movement toward the left and is about to be started toward the right by the crank-roll, which at this time is rotating upwardly and about the axis 10 of the main driving-gear 8. Immediately the crank-roll starts above the horizontal position shown at Fig. 3 its pressure upon the vertical bearer causes the bed to begin its movement toward the right, and this movement is gradually increased as the crank approaches a vertical position. At about the time the crank has arrived in an upright position the main driving-gear S, which had been gradually lifting bodily, strikes into gear with the upper main rack 3 and takes the bed at full speed, whereupon the crank-roll leaves the Vertical bearer and the guiding-pinion leaves IIO the curved guiding-rack. The said crank and pinion then make one revolution with the main driving-gear, and just before the main driving-gear runs out of mesh with the upper rack at the left-hand end the guiding-pinion runs into mesh with the left-hand curved rack and the vertical bearer is simultaneously brought up against the crankroll, which at this time is near a vertical line passing through the axis of the driving-gear, and the further movement of the bed toward the right is limited to the speed of the crank roller, which soon passes the vertical line and then descends along the vertical bearer as the latter advances by the momentum of the bed until the dead-point or horizontal center of the axis of rotation of the crank is reached, the crank-roll thus operating at this time gradually to slow down the speed of the bed and finally wholly to arrest its movement at such dead-point. The travel of the crankroll (beyond the dead-point) on the face of the bearer operates to start the bed again in the opposite direction, toward the left, and gradually to increase its speed. Just before the descending crank-roller reaches the aforesaid vertical line the main driving-gear comes into mesh with the lower straight rack 8, the guiding-pinion running in mesh with the lefthan d curved rack operating properly to guide the main gear into mesh with the straight rack, as before explained. Thereafter the gear drives the bed toward the left.

At Fig. 8 the crank is represented as in its horizontal position and as about to move the bed toward the right or to the position shown at Fig. 9, where the crank has now arrived at a vertical position and at which time the main driving-gear is engaged with the upper straight rack.

At Fig. 10 the crank is out of operative e11- gagement with the bearer and the bed is moving at full speed toward the right by reason of the engagement between the gear 8 and the rack 3.

At Fig. 11 the movement of the bed to the right by the said gear 8 and rack 8 has ceased and the bearer has come up against the ascending crank-roll, which is substantially in a vertical position, and controls the speed of the bed for the remainder of its movement to the right.

At Fig. 12 the movement of the bed to the right is shown as having been completed and the bed is about to be started toward the left by the descending crank-roll acting on the lower half of the vertical bearer, and, as before explained, just before or at about the time the crank-roll leaves the bearer the main gear 3 runs into mesh with the lower rack 53 and the bed is continued at full speed toward the left.

During the time the crank-roll is operating gradually to reverse the movement of the bed the vertical bearer, and hence the bed, is held up against the crank-roll or prevented from getting away from the same by one or the other of the rotating cams 36 37 and one of the bed-rolls 34:.

Referring to Fig. 8, it will be observed that at the time the crank-roll 31 is about to ascend and move the bed toward the right the righthand bed-roll 34: is at about the center ordeadpoint of the cam 36. During the ascent of the crank-roller to the vertical position shown at Fig. 9 the cam 30, revolving in the direction of the arrow, makes a quarter of a revolution or arrives at the position shown at Fig. 5), and during this movement of the cam from the position shown at Fig. 8 to that shown at Fig. 0 the bed-roll 34 travels along in contact with the inner face or edge of thecam and is controlled thereby, the movements of the cam being properly timed relatively to the movements of the crank, so that while the crankroll is acting on the vertical bearer the cam is acting on the bed-roller, thus confining the bed between the crank-roller and the cam.

\Vhile the crank-roll is in the horizontal position on the bearer and the bed-roll is at a midway position on the cam, as shown at Fig. 8, the pinion 43 and the cam 36, carried thereby, are in the position shown at Fig. 4. The bevel-gear 46 rotating in the direction of the arrow marked thereon causes the pinion 43 to travel in the same direction, and by rea son of the engagement of said pinion with the internal-toothed ring said pinion is at the same time caused to turn on its own axis and revolve in a direction opposite to that of the bevel-gear 46. In consequence of this bodily movement of the pinion with the bevel-gear 4G and of the independent rotary movement of said pinion about its own axis the cam 36 is caused to be kept in contact with the stud 34:, thereby holding the bearer 29 in contact with the crank-roll 31.

The positions of the parts shown diagrammatically at Figs. 8 and 9 correspond with those shown at Figs. 4 and 5. Thus while the bed-roll is moving from the position shown at Fig. 8 to that shown at Fig. 9 the cam 36 is given a movement of translation as well as a rotary movement, and when the parts have arrived in the position shown at Fig. 9 the cam is ready to part company with the bed-roll and to allow it to pass by or out between the ends of the cam, as shown at Fig. 10, at which time the main gearv is in mesh with the straight rack 3.

\Vhen the parts have arrived at the position shown at Fig. 10, the internal pinion 43 has made another quarter of a revolution around the internal-toothed ring or has arrived at the horizontal position again on the opposite side of the center of the crank-disk or bevel-gear 46. Vhen the pinion 43 has made three-fourths of a revolution around the fixed ring or has come to the position shown at Fig. 11, the cam 37 comes to the position shown at Fig. 11 and continues to rotate in the direction of the arrow thereon until the position shown at Fig. 12 is reached. While the said pinion 43 is making the afore- LIA said three-fourths of a revolution around thefiXed ring or is moving from the position shown at Fig. 10 to that shown at Fig. 11 the bed has traveled from the position shown at Fig. 10 to that shown at Fig. 11, and the bedroller 34 at the left-hand end of the bed is now in position to coact with the cam 37. \Vhen the bevel-gear 4e and pinion 4-3 have arrived in the horizontal position indicated at Fig. 12, the central portion of the cam 37 has arrived at the bed-roll and the bed has reached the limit of its travel toward the right. The crank-roll now begins to travel down the lower half ofthe vertical bearer and the bed moves toward the left. this time the cam 37 runs in contact with the bed roll, and hence keeps the bearer up against the crank-roll and coacts in conjunction therewith to control this part of the movement of the bed in a similar manner to that in which the cam 36 controlled the starting of the bed to the right, as explained with reference to Figs. 8 and 9. Depending upon the momentum of the bed in its slowing down, the cams will have avariable actionthat is to say, if there be too much momentum or too little spring resistance the cam will simply run around in contact with the bed-roll; but if there be too little momentum or too much spring resistance the cam will then perform the duty of forcing the bed along to the final portion of its intended stroke; but in the restarting of the bed in the opposite direction the cam will always control the movement of the bed or confine it to the action of the crank whether there be too much spring resistance or too little.

Owing to the fact that the main drivinggear 8 has an up-and-down swinging motion to and from the m ain d riving-racks 3, arranged in the same vertical plane, it is found in practice that two cams, as 36 and 37, produce a better result than one cam only, adapted alternately to engage the studs at the opposite ends of the bed; but if the main driving-gear be arranged to slide endwise to engage offset racks, as in the Cottrell patent aforesaid, a satisfactory result could be obtained with only one cam, as either 36 or 37. Therefore I do not wish to be limited wholly to the use of two cams in the following claims, excepting where the two cams are specifically set forth.

WVhile I have shown the cams as working in a horizontal position, they may of course be arranged to work in a vertical position, the driving or actuating parts being suitably mounted for that purpose, and the bed-rolls instead of depending from the bed being arranged to stand out lateral y or horizontally therefrom.

Various other changes in detail construction and in the arrangement of the parts of the mechanism additional to those hereinbefore pointed out may be made without at the same time departing from the gist of my invention.

During What I claim as new, and desire to secure by Letters Patent, is

1. The combination of a bed or member, means for reciprocating the same, means for reversing its direction of travel, and means for cooperating with the reversing mechanism consisting essentially of a rotatory cam and a part on or connected with the bed or member and independent of the reversing mechanism for coacting with said cam.

2. The combination of a bed or member, means for reciprocating the same, means for reversing its direction of travel, and means for cooperating with the reversing mechanism consisting essentially of a pair of rotatory cams and a part on or connected with each end of the bed or member and independent of the reversing mechanism and adapted to coact with one of said cams.

3. The combination of a bed or member, means for reciprocating the same, means for reversing its direction of travel, a projection at each end of said bed or member, and independent of the reversing mechanism and a rotatory cam for coacting with each said projection during the period of operation of the reversing means.

4. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, and a rotatory and bodily-movable cam for coacting with the bed or member and with the reversing mechanism.

5. The combination of a bed or member,

means for reciprocating the same, a reversing mechanism comprising essentially a bearer on the bed or member and a revolving crank, a projection on the bed, and a rotatory cam adapted to coact with said projection at the time the crank and bearer are coacting.

6. The combination of a bed or member having oppositely-arranged driving-racks, a driving-gear adapted to cooperate alternately with said racks to cause the bed to move first one way and then the other, a revolving crank, a bearer on the bed or member adapted to cooperate with said crank, and a rotatory cam adapted to cooperate with said bed or member at the same time the crank and bearer are cooperating therewith.

7. The combination of a bed or member having a pair of main driving-racks, a driving-gear adapted to alternately engage said racks, curved rack extensions at the ends of the bed, a revolving gear adapted to coact with said racks a bearer at each end of the bed, a revolving crank adapted to coact therewith, and a cam adapted to engage with a part at either end of the bed and cooperate with the crank and bearer in the acts of slowing down and stopping the bed and in the restarting of the same in the opposite direction.

8. The combination of a reciprocating bed -or member, a reversing mechanism, and a cam adapted to act on the bed or member and force the same to the end of its intended stroke, and also adapted to hold the same in proper relationship to the said reversing mechanism while the latter is acting to start the bed in the opposite direction.

9. The combination of a reciprocating bed or member, a reversing mechanism comprising essentially a crank and bearer, and a rotatory cam adapted to act on a projection on the bed to hold the said bearer against the said crank during the restarting of the bed in the reverse direction.

10. The combination of a bed or member having straight racks, a driving-gear for reciprocating the same, a bearer and a revolviug crank for slowing down, stopping, and restarting the bed in the opposite direction, and a cam adapted to act on the bed or member and complete its stroke, after the main driving-gear has disengaged from either of said racks, in case the bed or member should be unable to complete its stroke by momentum, and adapted also to hold the bearer in proper relationship to the crank during the restarting of the bed in the opposite direction and before the driving-gear engages with the other one of the main driving-racks.

11. The combination of a bed or member provided with parallel driving-racks, a rising and falling driving-gear adapted to engage alternately with said racks, curved rack extensions at the ends of the bed or member, a pinion connected to said driving-gear and adapted to engage said curved racks, a revolving crank connected to said driving-gear, bearers at the ends of said bed for coaeting with said crank, projections at the ends of said bed, and cams adapted to engage with and follow said projections during the time the crank and bearers and curved rack extensions and pinions are cooperating.

12. The combination of a bed or member, means for reciprocating the same, means for reversing its direction of travel, a fixed toothed ring, a pinion mounted on a crank arm or disk and traversing said ring, and a cam connected to said pinion and adapted to cooperate with the bed or member and with the reversing mechanism.

13. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a fixed toothed ring, and a crank arm or disk revolving always in the same direction, a pinion mounted loosely on the same and traversing said fixed toothed ring, and a cam rigidly connected to said pinion and adapted to cooperate with the bed or member and with the reversing mechanism.

14. The combination of a bed or member, means for reciprocating the same, areversing mechanism for the bed or member, a fixed toothed ring, a disk, means for rotating the same in one direction, a pinion loosely mounted on said disk, and traversing said fixed ring, a pair of cams connected to said pinion' ber adapted to cooperate with said cams.

15. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a fixed toothed ring, a pinion adapted to traverse the same, a disk rigidly attached to said pinion and bearing a cam, a bevel-gear or crankdisk having teeth and carrying a pivot or stud for said pinion, and means for rotating said bevel-gear always in one direction whereby the cam is carried bodily around with the bevel-gear and is rotated independently in the opposite direction about the pivot of the pinion as an axis of motion.

16. The combination of a bed or member, means for reciprocating the same, a reversing mechanism for the bed or member, a stud at each end of the bed or member, a pair of cams, one for each of said studs, a plate carrying said cams, a pinion attached to said plate, a crank-disk to which said pinion is connected, a pivot for said pinion, a fixed toothed ring which said pinion traverses, and suitable means for driving the crank-disk.

17. The combination of a bed or member, means for reciprocating the same, a reversing mechanism comprising essentially a bearer on the bed or member and a revolving crank, a projection on the bed or member, a rotatory cam, a pinion mounted on a crank and carrying said cam, and a fixed toothed ring for said pinion.

18. The combination of a bed or member having straight racks, a driving-gear for reciprocating the same, a bearer at each end of the bed or member, a revolving crank for slowing down, stopping, and restarting the bed in the opposite direction, a stud at each end of the bed, a cam for each stud, apinion carrying said cams, a fixed toothed ring with which said pinion meshes, a crank-disk upon which said pinion is pivotally mounted, and suitable driving mechanism for causing the pinion to traverse the fixed ring and carry the cams into and out of action with the studs.

19. The combination of a bed or member, a reversing mechanism comprising essentially a crank and bearer, a rotatory cam adapted to act on a projection of the bed, a pinion carrying said cam, a crank-disk on which said pinion is pivotally mounted, a fixed toothed ring for said pinion to traverse, bevelgearing for rotating said crank-disk, aspindle t a shaft 61, the gears (33, (34, 27, 28, and the power-shaft 22.

Signed at Stonington, in the county of New London and State of Connecticut, this 5th day of January, A. D. 1899.

CHARLES P. COTTRELL.

Witnesses:

ARTHUR M. OOTTRELL, A. R. STILLMAN.

and a pair of projections on the bed or mem- 

